So I experienced the same thing as the OP and I checked all the above posts with no luck. I looked into it further and found that my Modified Adjusted Gross Income (MAGI) did not require utilizing a backdoor Roth IRA. As a result, TurboTax says my wife's conversion is taxable and mine is not. I'm not exactly sure if this is correct.
Once I bumped my MAGI up to where I would need to to utilize the backdoor Roth, it solved the issue.
Thanks!
Edit: I started a new thread related to this topic as my situation was slightly different and the community responded with a good explanation/solution. Link provided here.
